a1 = 0.29056
a2 = 0.15571
a=a1*(0.5^0.7-0.1^0.7)/0.7+a2*((0.5^(-0.2)-1)/0.2+1/0.7)


check=a1*(0.5^-0.3-0.1^-0.3)/-0.3+a2*((0.5^(-1.2)-1)/1.2+1/1.7)

MASSLT2=a2*((2^-1.7-150^-1.7)/1.7)